Spring hammer



J. M. REDINGER SPRING HAMMER 3mm-m %/?%w WW 61H0: nu, i

Aug. 21, 1923.

Patented Aug. 2l, 1923.

JOSEPH M. Jenni.keine,l or rnovrnEncnmHonn ISLAND.

,SPRING HAMMER Application led December 6, 1921.- SerialN'o. 520,208.

. a hammer which has its working stroke effected by means of a coil springycombined with hand controlled means for restoring the hammer to a posi'tion in which the hammer Stores up power in the spring by compressing the latter andi for releasing the hammer to allow same to be given its working stroke by expansion of the-spring.

The invention further aims to provide a device of this kind which is of simple and compact construction and which is positive and reliablerin action.

Still further the invention aims to provide ajhand control which not only moves the hammer on its idle stroke to compress the spring thereof, but which also upon a further and `continued movement releases the hammer so that the 'latter Vis given its` working stroke upon expansion of its spring.

Further and other objects will be later set forth and manifested in the course ofV the following description.

In the drawings: l

Figure 1 is-a vertical sectional view partly in side elevation, and 'Figure 2 is asimilar-- view illustrating the position ofthe parts when the handle is in raised position.

In proceeding in accordance 'with the present invention a substantially T-shaped casing 1 is employedfso as to 'afford a vertical chamber 2 in which the hammer vpiston 3 reciprocates and a horizontal hand grip 4:. A coil spring 5 acts to tension the hammer piston 3, the latter striking against a stem 6 carrying a chuck 7 in which the hammer tool, not shown, issecured. Obviously various forms of tools can be placed in the chuck 7. The piston or plunger 3 is formed with a peripheral cut-out providing -a circular shoulder 8 the latter adapted to be engaged by a dog 9 pivoted at 10 toV a link 11. The link l1 has an elongated slot 12 receiving a pin 13 therein which latter is secured in the hollow handle 4- and limitsY the movement of the link 11. A hand lever 14 is pivoted between its ends at 15 and has its forward end 'provided with asocket 16 in which a sleeve 16 forming part of 'the dogvl 9 is arranged so that the dog 9 will be under vspring tension' by reason of the spring 17 which is contained within the sleeve 16,.the coil spring at its forward end being received in thersocket 18 formed in y the dog 9. The hand engagingvend of the leverf llextends through a slot vin part l to liev exteriorly thereof. rIhe coil spring 17 acts to urge the dog 9 outwardly in engagementwith'the plunger 3. A coil spring 19 is secured in the casing and is confined yby vmeans 0f a screw 20, the. spring 19 engaging on top of the hand lever yle to nor-` mally urge the latter downwardly. Spacel 21 isy left between vthe bottom end of the casing 1 and the chuck 7 so Aas to give .slight fleitibility tothe adjustment of the tool@ In the position shown in thedrawings theip'lunger 3 ,has completed its working stroke and the hand lever 14 is in its down position7 or in other words its outer end is in the position in which the operator will hold the same, and upon release of the hand lever bythe operator the spring 19 will force the innerend of thehand lever down, and the spring 17 will acton the dog 9 to force the latter toward the plunger 3fso that the nose ofthe dog will'engage under the shoulder 8, due to ythe fact that the spring 17 `will have moved thev link 11 to the right, which movement is permitted by the `slot12 inthe link. In this position of the parts shown in vFigure 2 the outer end of the hand lever 14 will be in upward position, and in orderto operate the hammer the `operatorv'iirst depresses the outer end ofthe lever 14 which causesthe inner end thereof to move upwardly carrying with it the dog 9,'fdue to sleeve 16 of the dog engaging in socket 16 of vlever 14E and since the dog is engaged beneath the shoulder 8 the hammer plunger will be raised thereby compressing the spring 57 and upon continued depression of the hand lever `1/1 the dog 9 will slip off from the shoulder 8 due to the movement of link 11, thereby allowing the spring 5 to expand and move the plunge er 3 to impact against the shank G or more properly speaking against the head 22 of the latter.

The link 11 controls theV position of the dog 9 so that'upon the full upward movedog for urging the latter toward the plunger,l

mentor1 the dog 9 to the position shown in the drawings, the 'pin 13 will be in Contact with back of the slot l2 thus, causing the dog 9 Vto slip oliq from the slioulder'S.

Having thus described my invention, what;

l claim as new and desire to secure by Letters Patent'is:- y Y l. ln a spring hammer, a T-shaped easing effort a cylinder and a. hand grip, a hammer carrying shank andY aspring tensioned plunger in the casing cylinder, a slotted link in the hand grip, pin passed through the slot of the link and carried by the hand grip, a hand leverupivoted to the hand grip, a spring` carried by the casing and bearing on top of the lever for urging the latter downwardly, a dog/pivoted to the link, a springbetween the hand lever and anda shoulder en the plunger for engagement y with the nose or' the dog, whereby upon ldepression of the hand lever the nose of the dog will engage beneath the shoulder and raise the plunger, and upon continued depression of,

the hand lever the dog will move outY et engagement with the shoulder te permit the plunger to move to its working stro-lie.

2. ln a spring hammer, a casing having` a spring tensioned shouldered plunger therein,

avlinlr having pivotal and longitudinal moye-v ment carried by the casing, a spring .pressed hand lever pivoted to the casing, and a spring pressed dog pivoted to the lmlr whereby upon depression or the hand lever'the degy will engage the plunger shoulder to raise the plunger against the actionr of its.

spring, and upon continuedV depression of thek hand lever-ther dog will be moved out of engagement with the shoulder to permit the plunger to be moved by its spring to its working stroke. l Y 3. lin a spring hammer, a spring pressed plungerhaving ashoulder, a link, means Vto mount the link to allow same to have pivotalandsliding movement, a dog pivoted to the linlrto engage the shoulder, a 'spring pressed lever, and connecting means between the dog the dog Y ,and lever to effect engagement oic with the shoulder upon movement of the ioulder, horizontal operati lever in one direction to raise the plunger and for subsequently permitting the dog to be disengaged from the plunger to release the latter. Y

Ll. ln a spring hammer, a spring pressed plunger having a. shoulder, spring' tensioned lifting means engageable with the shoulder, means to pivotally support theirst named means, means te pivotally and slidably mount said supporting mea-ns, and operating" means for effecting vertical movement or y the lifting means. l

5. lna spring hammer, a spring pressed j plunger having a shoulder, lifting means engageable with the shoulder, operating means connected to and for eilectingvertical movement of thev Alifting means, and means for mounting the lifting means for both pivotal and sliding movement.

6. ln a spring hammer, a springpressed ilungerA having a shoulder, 'vertically disa vertical part andv allateralliand grip,`av

hannner plungerv movable in the yvertical parts, and means for controlling the plunger, including a horizontal lever extending without the hand grip and approximately'parallel thereto whereby the'hand grip andthe lever may be each gripped in one hand.

ln testimony whereof l have signed my name to this specification in thepresence' of two subscribing witnesses.

JSEPH M. REDINGER. Witnesses if M. A. KINGSLEY, J. A. MILLER. 

